Socket-cap.



J. H. GUSS.

SOCKET CAP. APPLICATION FILED MAY 29.1913.

Patented July 14,1914.

JOHNHHAGOSS, or WATER-BURY, CONNECTICUT, ASSIGNOR TO soovILL MANUFAC- TuRING COMPANY, or WATERBURY, CONNECTICUT, A. CORPORATION or 001v- NECTICUT.

' socKE'r-oAr.

Specification of I etters iatent.

Patented July let, 19141..

Application filed May 29, 1913. Serial No. 770,733,

Be it known that I, JOHN H. G ross, a citizen oftlie United States, res ding at lvaterbury, in the county of New Haven and State of Connecticut, have inventednv certain new and useful Improvement in Socket-Caps, of which thefollowing is a full, clear, and exact description.

This invention relates primarily to the means for securing the hub to the sheet metal caps of electric light sockets, and n its special application here illustrated it is in the nature of an improvement upon the invention forming the subject of Patent No. 985,246, dated February 28,1911, and granted to the Scovill Manufacturing Company,

' as assignees of William McK. Black, who

are also owners of the present invention. In the patent mentioned, the hub and cap are united by staking their juxtaposed flanges, but even exercising great care in so uniting them, these flanges are often split, and as a result the joint will not eflectively resist the torsional strains to which the parts are subjected in the subsequent operations of manufacture and in use. The present invention is designed to prevent such splitting of the flanges and consequent weakness.

The invention consists of a socket cap in which the hub and cap are united rolling over or expanding their respective pixtaposed flanges so as to firmly and rig dly unite the parts, secure against longitudinal and torsional strains, and without splitting.

or staking or breaking either of the flanges, all as I will proceed now to explain and finally claim.

1n the accompanying drawings illustrating, the invention, in the several figures of which like parts are similarly designated,

Figure 1 is a cross-section of the washer,

Fig. 2 is a longitudinal section of the cap shell, Fig. 3 is a longitudinalsection of the hub; Fig. 4 is a-top plan view of the washer; Fig. 5 is a plan View of the capshell, and Fig. Gis a top plan view of the hub having a plain flange,all of which are constituent parts of the socket cap of this invention. Fig. 7 is aplan View, and Fig. 8 is a longitudinal section of the several constituent parts ready for assembling, but illustrating a hub having a knurled flange. Fig. 9 is a plan view, and .Fig. 10 is a longitudinal section of the assembled parts as they appear in a finished cap. Fig. 11

is a top plan view of a hub having a. knurled flange. I

The shell 1, may be of any approved construction, excepting that its lnib-rcceiving hole 2 is encircled by a sul'istantially straight, inwardly extending flange 3 and around this flange is a recess 4 in the, shell to receive the washer 5. be of any approved construction, but p ovided with a flange 7 and a shoulder S; and as indicated in Figs. '7, 8, 9 and 11, the periphery of the flange 7 may be knurled, milled or toothed, so as to afford a better grip on the flange 3 of the shell. These parts, namely, the shell and hub, are assembled substantially as indicated in Figs. 7 and 8, with the flanges 3 and 7, respectively on the shell and the hub, juxtaposed in a more or less intimate contact, and with the washer 5 in the recess .4, and. thenby means of a suitable tool or suitable tools the flange 7 is expanded so that it will expand the flange 3 coextensively, and the two thus expanded'tlanges will grip the Such expanding of the flanges, and will serve to retain both flanges in whole, that is to say unbroken condition, to thereby conserve their original strength to resist longitudinal and tor sional strains to which the parts are subccted in the subsequent operations o'l' manufactnre and in use. As shown in Figs. 9 and 10, the flanges may be expanded without splitting or breaking the metal, and a smooth and symmetrical oint be made; and it is to be particularly noted that because the shell flange 3 is not broken, the joint has a maximum resistance against torsional strains.

The joint is formed by means of a round punch, which tends to draw the metal of the two flanges and. the washer together and roll over the upper edges of the flanges in extremely close contact with one another and the Washer. in iFrounded manner, without breaking or splitting them. Theknurled periphery of the hub flange assists in the gripiot' the'flanges on one another, because the partsaic-so made that they [it each other reasonably close before the final clos-' .mg or the ]01nt-..

The described closure or joint, combining the described titof the washer, shell and The hub (i may hub to each other, and the 'deseribecl'knurled peri ihery on -the hub, is-lan imp'rovement over the closure or joint described in Patent No. 98:12am, because-stronger to resist not" only the longitudinalstrains and the-tofu joint is formed.

sional strains to which the completed artiole subjected in use, but also because it more eifectiv ely resists the same strains to which the. article/is subjected inthe operations of its lnanufaeture subsequent to that of closing, and especially to that of tapping the thread in thehub after the. o isure orv f \Vhat I claim is: v I I 1'. A socket cap,'. comprising a shell having a hl'lbllOlB, an inwardly projectingflange encircling such hole, and a "recess surrounding the flange, a Washer arranged 111 said recess and en'ibralclng: the flange,

hub-hole, the hub flange and the shell flange iy hand this 28th ,i ioato v in a smooth, ;rounded' and' whole condition;v

thereby uniting the shell and hub so as' to' effectively resist longitudinal and torsional sti'ains.'- t r '2. socket comprising-ahellliav- :ingfa hub-hole, -an inwardly projecting flange encircling such hole, and arelcess surrounding the flange, :1 u' ashenlocated eontaet' with the shell-fiange, the flanges of i -"the ;shel l andthe hub being turned over Q together and over upon the Washer thereby avoiding breaking orstaking the metal of theiflanges. v

In testimony "whereof I have hereunto set t i JOHN HiGOSS- llVi-tnesses CLARA' L. D DGE, MAltGARET- El LEGGE'lTif day of May, A. DL1913 40 I 

